serrated nut

例句：

1. 1. The hunter found a serrated nut hidden in the forest.
   猎人在森林里发现了一个藏在树丛中的锯齿状坚果。
2. 2. The old man used to eat serrated nuts as a treat for his health.
   这位老人过去常吃锯齿状坚果作为他健康的小零食。
3. 3.The nut was so serrated that it could not be easily opened with a knife.
   这个坚果太锯齿了，不能用刀轻易地打开。